Pay-per-call loan data endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/loans/38` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific resource at `/loans/38` is labeled "Premium API Access" and returns JSON data via HTTP POST. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`).
The x402 challenge advertises a `maxAmountRequired` of 20000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site-wide pricing of $0.02/request shown on the landing page. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.
Documentation is extremely sparse. The `/docs`, `/pricing`, `/api`, and `/README` pages all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema documentation, and no description of what the `/loans/38` resource actually returns. The endpoint path suggests loan-related financial data, but the exact payload structure is unknown. The broader site lists many endpoint categories (analytics, AI, finance, infrastructure) all at the same $0.02 price point, but none have published documentation beyond their listing titles.
Capabilities
Use cases
- —Retrieving loan-related financial data on a per-request basis without API key registration
- —Programmatic access to premium data endpoints using x402 micropayments
- —Agent-driven workflows that need on-demand financial data with crypto settlement
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents that can settle x402 payments on Base in USDC
- —Prototyping workflows that need instant access without rate limits
Not for
- —Users who need detailed API documentation or response schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/loans/38 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the /loans/38 resource accepts or returns. No OpenAPI spec, no request/response examples, and the docs pages are empty. The endpoint's purpose can only be guessed from its URL path.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all render only a wallet-connect prompt
- —No request or response schema published; the actual data returned by /api/v1/loans/38 is unknown
- —The endpoint path '/loans/38' suggests a specific loan record but its meaning is undocumented
- —The site lists many diverse API categories (AI, analytics, finance, utils) all at $0.02 — unclear if all are fully implemented
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/loans/38
- —Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/loans/38